/* ==========================================================================
   SphereDrive Master Core Design Engine Tokens
   ========================================================================== */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --border-color: #e2e8f0;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --accent-color: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: #eff6ff;
    
    --error-color: #ef4444;
    --error-bg: #fef2f2;
    --warning-color: #f59e0b;
    --warning-bg: #fffbeb;
    --success-color: #10b981;
    --success-bg: #ecfdf5;

    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.03), 0 1px 2px rgba(15, 23, 42, 0.02);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -1px rgba(15, 23, 42, 0.02);
    --shadow-lg: 0 20px 25px -5px rgba(15, 23, 42, 0.05), 0 10px 10px -5px rgba(15, 23, 42, 0.02);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Global Base Structural Resets
   ========================================================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
}

body {
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.page-spacing {
    padding: 80px 24px 120px 24px;
}

.text-center { text-align: center; }
.hidden { display: none !important; }
.full-width { width: 100%; }
.text-accent { color: var(--accent-color); }

/* ==========================================================================
   Typography Framework Hierarchy
   ========================================================================== */
h1, h2, h3, h4, h5 {
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: 3.25rem; letter-spacing: -0.03em; }
h2 { font-size: 2.25rem; letter-spacing: -0.02em; }
h3 { font-size: 1.5rem; letter-spacing: -0.01em; }
h4 { font-size: 1.15rem; }

p { color: var(--text-secondary); }
.large-paragraph { font-size: 1.15rem; color: var(--text-secondary); margin-bottom: 24px; }
.muted-text { font-size: 0.85rem; color: var(--text-muted); }

/* ==========================================================================
   Interactive UI Controls & Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.9rem;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition-smooth);
    text-decoration: none;
}

.btn-primary { background-color: var(--accent-color); color: var(--bg-primary); }
.btn-primary:hover { background-color: var(--accent-hover); }

.btn-secondary { background-color: var(--bg-tertiary); color: var(--text-secondary); }
.btn-secondary:hover { background-color: var(--border-color); color: var(--text-primary); }

.btn-danger-outline { background-color: transparent; border-color: var(--border-color); color: var(--error-color); }
.btn-danger-outline:hover { background-color: var(--error-bg); border-color: var(--error-color); }

.btn-lg { padding: 14px 28px; font-size: 1rem; border-radius: var(--radius-md); }

.badge {
    display: inline-block;
    background-color: var(--accent-light);
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.8rem;
    padding: 6px 14px;
    border-radius: 50px;
    margin-bottom: 16px;
}

/* ==========================================================================
   Sticky Navigation Architecture
   ========================================================================== */
.header {
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.nav-container { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.3rem; text-decoration: none; color: var(--text-primary); }
.logo-icon { color: var(--accent-color); font-size: 1.5rem; }
.nav-menu { display: flex; gap: 32px; }
.nav-link { font-weight: 500; font-size: 0.95rem; text-decoration: none; color: var(--text-secondary); transition: var(--transition-smooth); }
.nav-link:hover, .nav-link.active { color: var(--accent-color); }

/* ==========================================================================
   Homepage Marketing Components
   ========================================================================== */
.hero-section { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 64px; align-items: center; padding: 100px 24px 120px 24px; }
.hero-subtitle { font-size: 1.25rem; margin: 24px 0 36px 0; max-width: 540px; }
.hero-buttons { display: flex; gap: 16px; margin-bottom: 32px; }
.hero-meta { display: flex; gap: 24px; font-size: 0.85rem; color: var(--text-secondary); }
.hero-meta i { color: var(--accent-color); }

.window-mockup { background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); overflow: hidden; }
.window-header { background: var(--bg-secondary); border-bottom: 1px solid var(--border-color); padding: 14px 20px; display: flex; align-items: center; gap: 20px; }
.window-dots { display: flex; gap: 6px; }
.window-dots .dot { width: 10px; height: 10px; background: #cbd5e1; border-radius: 50%; }
.window-search { background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: var(--radius-sm); padding: 4px 12px; font-size: 0.75rem; color: var(--text-muted); flex-grow: 1; max-width: 260px; }
.window-body { display: grid; grid-template-columns: 140px 1fr; height: 260px; }
.mock-sidebar { background: var(--bg-secondary); border-right: 1px solid var(--border-color); padding: 16px 12px; font-size: 0.75rem; font-weight: 600; display: flex; flex-direction: column; gap: 8px; }
.mock-sidebar div { display: flex; align-items: center; gap: 8px; padding: 6px 8px; border-radius: var(--radius-sm); }
.mock-sidebar .active { background: var(--accent-light); color: var(--accent-color); }
.mock-content { padding: 20px; }
.file-grid-mock { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.file-card-mock { border: 1px solid var(--border-color); padding: 16px 8px; text-align: center; font-size: 0.7rem; font-weight: 500; border-radius: var(--radius-sm); }
.file-card-mock i { display: block; font-size: 1.4rem; margin-bottom: 8px; }
.pdf-icon { color: #ef4444; } .img-icon { color: #3b82f6; } .code-icon { color: #10b981; }

.features-section { background-color: var(--bg-secondary); padding: 100px 0; border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
.section-header { text-align: center; max-width: 620px; margin: 0 auto 64px auto; }
.section-header h2 { margin-bottom: 16px; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 32px; }
.feature-card { background: var(--bg-primary); border: 1px solid var(--border-color); padding: 36px; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); transition: var(--transition-smooth); }
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.feature-icon-wrapper { width: 48px; height: 48px; background: var(--accent-light); color: var(--accent-color); display: flex; align-items: center; justify-content: center; font-size: 1.25rem; border-radius: var(--radius-sm); margin-bottom: 24px; }
.feature-card h3 { margin-bottom: 12px; }

.split-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; padding: 120px 24px; }
.split-layout.reverse .split-image { order: 2; }
.section-label { text-transform: uppercase; font-size: 0.75rem; font-weight: 700; color: var(--accent-color); letter-spacing: 0.1em; display: block; margin-bottom: 12px; }
.split-text h2 { margin-bottom: 20px; }

.storage-visual-card { background: var(--bg-primary); border: 1px solid var(--border-color); padding: 32px; border-radius: var(--radius-md); box-shadow: var(--shadow-md); }
.storage-info { display: flex; justify-content: space-between; margin-bottom: 12px; font-size: 0.9rem; }
.progress-bar-container { width: 100%; height: 8px; background: var(--bg-tertiary); border-radius: 4px; overflow: hidden; margin-bottom: 8px; }
.progress-bar { height: 100%; background: var(--accent-color); border-radius: 4px; }
.storage-usage-text { font-size: 0.8rem; color: var(--text-muted); }

.crypto-shield-box { background: var(--bg-secondary); border: 1px solid var(--border-color); height: 220px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; gap: 20px; }
.core-shield-icon { font-size: 3.5rem; color: var(--accent-color); }
.transient-icon { font-size: 1.5rem; color: var(--text-muted); }
.connection-line { width: 80px; height: 2px; background: linear-gradient(90deg, var(--border-color), var(--accent-color)); }

.share-links-preview { background: var(--bg-primary); border: 1px solid var(--border-color); padding: 32px; border-radius: var(--radius-md); box-shadow: var(--shadow-md); }
.link-row { display: flex; justify-content: space-between; align-items: center; background: var(--bg-secondary); border: 1px solid var(--border-color); padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 16px; }
.link-text { font-family: monospace; font-size: 0.85rem; color: var(--text-secondary); }
.copy-badge { font-size: 0.75rem; background: var(--accent-color); color: var(--bg-primary); padding: 4px 10px; border-radius: 4px; font-weight: 600; cursor: pointer; }
.link-permissions { display: flex; gap: 20px; font-size: 0.8rem; font-weight: 500; color: var(--text-secondary); }

.cta-section { padding: 80px 24px 140px 24px; }
.cta-box { background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 80px 40px; text-align: center; }
.cta-box h2 { margin-bottom: 20px; }
.cta-box p { max-width: 580px; margin: 0 auto 32px auto; font-size: 1.15rem; }

/* ==========================================================================
   Pricing Architecture Components
   ========================================================================== */
.pricing-toggle-container { display: flex; align-items: center; justify-content: center; gap: 16px; margin-top: 32px; }
.toggle-label { font-weight: 600; font-size: 0.95rem; color: var(--text-secondary); transition: var(--transition-smooth); }
.toggle-label.active { color: var(--text-primary); }
.discount-pill { font-size: 0.75rem; background: var(--success-bg); color: var(--success-color); padding: 2px 8px; border-radius: 4px; margin-left: 4px; }
.switch { position: relative; display: inline-block; width: 50px; height: 26px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: var(--border-color); transition: .4s; }
.slider:before { position: absolute; content: ""; height: 18px; width: 18px; left: 4px; bottom: 4px; background-color: white; transition: .4s; }
input:checked + .slider { background-color: var(--accent-color); }
input:checked + .slider:before { transform: translateX(24px); }
.slider.round { border-radius: 34px; }
.slider.round:before { border-radius: 50%; }

.pricing-cards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; margin-top: 64px; }
.pricing-card { background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 40px 32px; display: flex; flex-direction: column; position: relative; transition: var(--transition-smooth); }
.pricing-card.highlighted { border-color: var(--accent-color); box-shadow: var(--shadow-lg); }
.popular-badge { position: absolute; top: -14px; left: 32px; background: var(--accent-color); color: var(--bg-primary); font-size: 0.75rem; font-weight: 700; padding: 4px 12px; border-radius: 50px; }
.card-header-block { margin-bottom: 28px; }
.card-header-block h3 { font-size: 1.35rem; margin-bottom: 8px; }
.plan-desc { font-size: 0.85rem; min-height: 40px; margin-bottom: 16px; }
.price-display { display: flex; align-items: baseline; color: var(--text-primary); }
.price-display .currency { font-size: 1.5rem; font-weight: 700; }
.price-display .amount { font-size: 3rem; font-weight: 700; letter-spacing: -0.02em; line-height: 1; }
.price-display .period { font-size: 0.9rem; color: var(--text-secondary); font-weight: 500; }
.plan-features-list { list-style: none; margin-top: 32px; display: flex; flex-direction: column; gap: 14px; }
.plan-features-list li { display: flex; align-items: center; gap: 10px; font-size: 0.85rem; font-weight: 500; color: var(--text-secondary); }
.plan-features-list i { color: var(--accent-color); font-size: 1rem; }

/* ==========================================================================
   Support & FAQ System Modules
   ========================================================================== */
.support-grid { display: grid; grid-template-columns: 280px 1fr; gap: 64px; margin-top: 48px; }
.support-topics-list { list-style: none; display: flex; flex-direction: column; gap: 8px; margin-top: 16px; }
.support-topics-list li { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-radius: var(--radius-sm); font-weight: 600; font-size: 0.9rem; color: var(--text-secondary); cursor: pointer; transition: var(--transition-smooth); }
.support-topics-list li:hover, .support-topics-list li.active { background: var(--bg-secondary); color: var(--accent-color); }
.contact-card-box { background: var(--bg-secondary); border: 1px solid var(--border-color); padding: 24px; border-radius: var(--radius-md); margin-top: 40px; }
.contact-card-box h4 { margin-bottom: 8px; }
.contact-card-box p { font-size: 0.85rem; margin-bottom: 16px; }
.support-content-area h3 { margin-bottom: 28px; border-bottom: 2px solid var(--bg-tertiary); padding-bottom: 12px; }
.faq-card { border: 1px solid var(--border-color); padding: 28px; border-radius: var(--radius-md); margin-bottom: 20px; box-shadow: var(--shadow-sm); }
.faq-card h4 { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.faq-card p { font-size: 0.95rem; padding-left: 28px; }

/* ==========================================================================
   Developer API Documentation Core
   ========================================================================== */
.docs-layout { display: grid; grid-template-columns: 260px 1fr; gap: 64px; }
.docs-sidebar h4 { text-transform: uppercase; font-size: 0.75rem; letter-spacing: 0.05em; color: var(--text-muted); margin-bottom: 16px; }
.docs-nav-link { display: block; text-decoration: none; font-size: 0.9rem; font-weight: 500; color: var(--text-secondary); padding: 8px 0; transition: var(--transition-smooth); }
.docs-nav-link:hover, .docs-nav-link.active { color: var(--accent-color); font-weight: 600; }
.docs-body hr { border: none; border-top: 1px solid var(--border-color); margin: 32px 0; }
.docs-section { margin-bottom: 48px; }
.docs-section h3 { margin-bottom: 16px; }
.code-block { background: var(--text-primary); color: #e2e8f0; padding: 18px 24px; border-radius: var(--radius-sm); font-family: monospace; font-size: 0.85rem; overflow-x: auto; margin: 16px 0; line-height: 1.5; }
.method-badge { display: inline-block; font-size: 0.75rem; font-weight: 700; padding: 4px 8px; border-radius: 4px; margin-right: 8px; }
.method-badge.post { background: var(--accent-light); color: var(--accent-color); }
.endpoint-text { font-family: monospace; font-weight: 600; color: var(--text-primary); }

/* ==========================================================================
   Realtime Status Dashboard Module
   ========================================================================== */
.status-banner { padding: 18px 24px; border-radius: var(--radius-md); font-weight: 600; display: flex; align-items: center; gap: 12px; margin-bottom: 64px; }
.status-banner.operational { background: var(--success-bg); color: var(--success-color); }
.status-components-box { border: 1px solid var(--border-color); border-radius: var(--radius-md); overflow: hidden; margin-bottom: 64px; box-shadow: var(--shadow-sm); }
.status-row { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; background: var(--bg-primary); border-bottom: 1px solid var(--border-color); }
.status-row:last-child { border-bottom: none; }
.component-meta strong { display: block; color: var(--text-primary); font-size: 0.95rem; }
.status-badge { font-size: 0.75rem; font-weight: 700; padding: 6px 14px; border-radius: 50px; }
.status-badge.operational { background: var(--success-bg); color: var(--success-color); }
.status-badge.degraded { background: var(--warning-bg); color: var(--warning-color); }
.status-badge.maintenance { background: var(--bg-tertiary); color: var(--text-secondary); }
.past-incidents-block h3 { margin-bottom: 24px; }
.incident-timeline-item { border-left: 2px solid var(--border-color); padding-left: 24px; position: relative; padding-bottom: 16px; }
.incident-timeline-item:before { content: ""; position: absolute; width: 10px; height: 10px; background: var(--accent-color); border-radius: 50%; left: -6px; top: 6px; }
.timeline-date { font-size: 0.8rem; font-weight: 700; color: var(--text-muted); display: block; margin-bottom: 4px; }

/* ==========================================================================
   Compliance & Legal Layout Elements
   ========================================================================== */
.compliance-cards-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 32px; margin-top: 48px; }
.trust-card { border: 1px solid var(--border-color); padding: 36px; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.trust-card h3 { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.legal-container { max-width: 800px; margin: 0 auto; }
.legal-container h3 { margin: 32px 0 12px 0; }
.legal-container hr { border: none; border-top: 1px solid var(--border-color); margin: 20px 0 40px 0; }

/* ==========================================================================
   Ecosystem Architecture Diagram Components
   ========================================================================== */
.framework-diagram-mock { display: flex; align-items: center; justify-content: space-between; background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: 48px; margin: 48px 0 64px 0; gap: 16px; }
.diagram-node { background: var(--bg-primary); border: 1px solid var(--border-color); padding: 24px; border-radius: var(--radius-md); text-align: center; flex: 1; box-shadow: var(--shadow-sm); }
.diagram-node i { font-size: 2rem; color: var(--text-muted); margin-bottom: 12px; }
.diagram-node.secure i { color: var(--success-color); }
.diagram-node.media i { color: var(--accent-color); }
.diagram-node h5 { margin-bottom: 8px; }
.diagram-node p { font-size: 0.75rem; }
.diagram-arrow { color: var(--text-muted); font-size: 1.25rem; }
.framework-details-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }

/* ==========================================================================
   Cloud Storage Dashboard Workspace Elements
   ========================================================================== */
.dashboard-body { background: var(--bg-secondary); min-height: 100vh; }
.dashboard-layout { display: grid; grid-template-columns: 260px 1fr; gap: 40px; padding-top: 40px; padding-bottom: 80px; }
.dashboard-sidebar { display: flex; flex-direction: column; gap: 8px; }
.sidebar-block { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-radius: var(--radius-sm); font-weight: 600; font-size: 0.9rem; color: var(--text-secondary); cursor: pointer; transition: var(--transition-smooth); }
.sidebar-block:hover, .sidebar-block.active { background: var(--bg-primary); color: var(--accent-color); box-shadow: var(--shadow-sm); }
.storage-counter-widget { background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 20px; margin-top: auto; box-shadow: var(--shadow-sm); }
.widget-header { display: flex; justify-content: space-between; font-size: 0.8rem; margin-bottom: 10px; }
.storage-subtext { font-size: 0.75rem; color: var(--text-muted); display: block; margin-top: 6px; }

.workspace-header-actions { display: flex; justify-content: space-between; align-items: center; gap: 20px; margin-bottom: 32px; }
.search-input-wrapper { position: relative; flex-grow: 1; max-width: 480px; }
.search-input-wrapper i { position: absolute; left: 16px; top: 14px; color: var(--text-muted); }
.search-input-wrapper input { width: 100%; padding: 12px 16px 12px 44px; border: 1px solid var(--border-color); border-radius: var(--radius-sm); font-family: inherit; font-size: 0.9rem; outline: none; transition: var(--transition-smooth); box-shadow: var(--shadow-sm); }
.search-input-wrapper input:focus { border-color: var(--accent-color); background: var(--bg-primary); }
.form-select { padding: 12px 16px; border: 1px solid var(--border-color); border-radius: var(--radius-sm); background: var(--bg-primary); font-family: inherit; font-size: 0.9rem; color: var(--text-secondary); cursor: pointer; outline: none; box-shadow: var(--shadow-sm); }

.loading-state, .empty-state { text-align: center; padding: 80px 24px; background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.loading-state i { font-size: 2.5rem; color: var(--accent-color); margin-bottom: 16px; }
.empty-state i { font-size: 3rem; color: var(--text-muted); margin-bottom: 16px; }
.empty-state h4 { margin-bottom: 8px; }

.file-grid-container { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 24px; }
.file-card-interactive { background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 20px; text-decoration: none; color: inherit; display: flex; flex-direction: column; transition: var(--transition-smooth); box-shadow: var(--shadow-sm); cursor: pointer; }
.file-card-interactive:hover { transform: translateY(-2px); border-color: var(--accent-color); box-shadow: var(--shadow-md); }
.card-thumbnail-zone { height: 120px; background: var(--bg-secondary); border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center; font-size: 2.5rem; margin-bottom: 16px; color: var(--text-muted); overflow: hidden; position: relative; }
.card-thumbnail-zone img { width: 100%; height: 100%; object-fit: cover; }
.file-card-interactive h4 { font-size: 0.95rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 4px; }
.card-meta-line { display: flex; justify-content: space-between; font-size: 0.75rem; color: var(--text-muted); font-weight: 500; }

/* ==========================================================================
   Individual Asset Inspection Pane Layout
   ========================================================================== */
.viewer-layout-grid { display: grid; grid-template-columns: 1fr 360px; gap: 40px; margin-top: 24px; }
.media-preview-box { background: var(--bg-secondary); border: 1px solid var(--border-color); border-radius: var(--radius-lg); height: 440px; display: flex; align-items: center; justify-content: center; font-size: 5rem; color: var(--text-muted); overflow: hidden; box-shadow: var(--shadow-sm); }
.media-preview-box img { max-width: 100%; max-height: 100%; object-fit: contain; }
.media-preview-box video { width: 100%; height: 100%; background: #000; }
.meta-details-table { border: 1px solid var(--border-color); border-radius: var(--radius-md); overflow: hidden; margin: 24px 0; box-shadow: var(--shadow-sm); }
.meta-data-row { display: flex; justify-content: space-between; padding: 14px 18px; background: var(--bg-primary); border-bottom: 1px solid var(--border-color); font-size: 0.85rem; }
.meta-data-row:last-child { border-bottom: none; }
.meta-data-row span { color: var(--text-secondary); font-weight: 500; }
.viewer-actions-stack { display: flex; flex-direction: column; gap: 12px; }

/* ==========================================================================
   Error Handlers Layout
   ========================================================================== */
.error-page-wrapper { padding: 120px 24px; }
.error-illustration-box { position: relative; display: inline-block; margin-bottom: 32px; }
.floating-node { font-size: 5rem; color: var(--accent-light); }
.error-code-label { font-size: 2.5rem; font-weight: 800; color: var(--accent-color); position: absolute; top: 20%; left: 0; right: 0; }
.error-action-row { display: flex; justify-content: center; gap: 16px; margin-top: 32px; }
.large-icon { font-size: 3.5rem; margin-bottom: 20px; }
.text-error { color: var(--error-color); }

/* ==========================================================================
   Global Modern Brand Footer Structure
   ========================================================================== */
.footer { background-color: var(--bg-secondary); border-top: 1px solid var(--border-color); padding: 80px 0 40px 0; margin-top: auto; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 48px; margin-bottom: 60px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-desc { font-size: 0.9rem; max-width: 280px; }
.footer-links-col h4 { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-primary); margin-bottom: 20px; }
.footer-links-col a { display: block; text-decoration: none; color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 12px; transition: var(--transition-smooth); }
.footer-links-col a:hover { color: var(--accent-color); }
.footer-bottom { border-top: 1px solid var(--border-color); padding-top: 32px; text-align: center; font-size: 0.85rem; color: var(--text-muted); }

/* ==========================================================================
   Adaptive Presentation Breakpoints (Responsive Layouts)
   ========================================================================== */
@media (max-width: 992px) {
    h1 { font-size: 2.5rem; }
    .hero-section { grid-template-columns: 1fr; text-align: center; gap: 48px; }
    .hero-subtitle { margin-left: auto; margin-right: auto; }
    .hero-buttons, .hero-meta { justify-content: center; }
    .split-layout, .split-layout.reverse { grid-template-columns: 1fr; gap: 40px; padding: 60px 24px; }
    .split-layout.reverse .split-image { order: 0; }
    .pricing-cards-grid { grid-template-columns: repeat(2, 1fr); }
    .support-grid, .docs-layout, .dashboard-layout, .viewer-layout-grid { grid-template-columns: 1fr; gap: 40px; }
    .dashboard-sidebar { flex-direction: row; flex-wrap: wrap; }
    .storage-counter-widget { width: 100%; margin-top: 16px; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .framework-diagram-mock { flex-direction: column; }
    .diagram-arrow { transform: rotate(90deg); margin: 8px 0; }
}

@media (max-width: 640px) {
    .nav-menu { display: none; }
    .pricing-cards-grid, .footer-grid { grid-template-columns: 1fr; }
    .workspace-header-actions { flex-direction: column; align-items: stretch; }
}

/* ==========================================================================
   Adapt)
   ========================================================================== */